Insiders with ties to the Obama administration tell The Cable that U.S. ambassador to the United Nations Susan Ricehas become the heir apparent to National Security Advisor Tom Donilon — a post at the epicenter of foreign-policy decision making and arguably more influential than secretary of state, a job for which she withdrew her candidacy last fall amid severe political pressure.

The report quotes a pair of sources who said that Rice will inevitably succeed current National Security Advisor Tom Donilon whenever he leaves the post.

“It’s definitely happening,” one source said.

Rice was thought to be the favorite to succeed Hillary Clinton at the State Department, but her would-be nomination never got off the ground ostensibly due to Republican criticism over her appearances on Sunday talk shows following the attack in Benghazi, Libya.

“It’s definitely happening,” a source who recently spoke with Rice told The Cable. “She is sure she is coming and so too her husband and closest friends.”

“Susan is a very likely candidate to replace him whenever he would choose to leave,” agreed Dennis Ross, a former special assistant to President Obama and counselor at the Washington Institute. “She is close to the president, has the credentials, and has a breadth of experience.”

Both sources said the timing of succession was uncertain. “I don’t believe Tom Donilon is about to leave but would be surprised if he were to remain for the whole second term,” Ross said. “But in answer to your question, [Rice’s appointment] is very logical.”

Rice’s candidacy for secretary of state imploded in November after she recited talking points about the Sept. 11 attack in Benghazi on five Sunday talk shows that turned out to be erroneous.

The question now is whether Benghazi’s return to the spotlight will affect her potential appointment at a time when the White House is reeling from revelations about the IRS’s scrutiny of conservative groups and the Justice Department’s subpoena of the calling records of AP journalists.

For now, prominent Republicans don’t seem inclined to make a fuss.

In November, Arizona Sen. John McCain pledged to “do everything in my power to block her from becoming secretary of state”; South Carolina Sen.Lindsey Grahamsaid, “I don’t think she deserves to be promoted”; and Tennessee Sen. Bob Corkersaid she’d make a better DNC chair: “I think most of us want someone who is more independent minded.”

But now — even as Benghazi fever reaches a crescendo following last week’s dramatic “whistleblower” hearing and Wednesday’s release of 100 pages of Benghazi emails — the GOP’s desire to check her rise has seemingly evaporated, and Republicans have few tools to prevent her appointment, which would not require Senate confirmation.

When asked if he was concerned about a future National Security Adviser Susan Rice, Corker, the ranking member of the Senate Foreign Relations Committee, told The Cable he was sitting this one out.

“In the case of national security advisor,” he said, “whomever serves in that position serves at the pleasure of the president. So it’s totally his prerogative.” When The Cable asked Graham and McCain the same question, their spokesmen declined to comment.

In some ways, the deflated interest in Rice is only natural. Though the testimony of State Department witnesses last week served to highlight the inaccuracy of Rice’s talk-show appearances, new details of the editing process of her talking points show her nowhere near the drafting process — just as the administration has long maintained.

Meanwhile, a more tantalizing GOP target has emerged in the form of Hillary Clinton, the overwhelming favorite to assume the Democratic presidential nomination in 2016. Democrats, Republicans and witnesses fixated on Clinton 32 times during discussions in last week’s hearing.

Rice spokeswoman Erin Pelton declined to comment for this article. White House National Security Council Spokeswoman Caitlin Hayden said, “We don’t have any personnel announcements to make at this time, and Mr. Donilon has no plans to depart at this point.” She added that Donilon is “fully engaged in managing our national security agenda, from his recent trip to Moscow and major address on global energy, to planning for a trip to China in late May and more upcoming speaking events.”

The administration hasn’t shied away from heaping praise on Rice. Last week, at a gala for the Joint Center for Political and Economic Studies, Vice President Joe Bidentold the audience that the U.N. ambassador has “the absolute, total, complete confidence of the president,” and that when she speaks on issues of foreign policy, nobody doubts she’s speaking for Obama.

Back in March, when colleague Colum Lynch first reported whispers of Rice’s comeback, Ben Rhodes, deputy national security adviser for strategic communications, spoke glowingly of Rice’s relationship with the president. “Susan always maintains close relations with the president and his national security team, and that continues to be the case,” he said. “If anything, the way she handled the Benghazi situation — and then the withdrawal — only enhanced her relations here, because she did so with grace and good humor.”

The president himself has gone out of his way to wink at an expanded role for Rice within his administration. “I have every confidence that Susan has limitless capability to serve our country now and in the years to come, and know that I will continue to rely on her as an advisor and friend,” Obama said in a December statement.